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### Understanding the SP25 Rack System

You can extend the logic from the above topics to the SP25 rack system. This rack can hold two different types of probe components. For one type the port is calibrated empty, and for the other type a port is calibrated with an insert.

This discussion will abandon the previous references to SP600, TP2, TP20, and TP200 since the SP25 rack system uses these components instead:

- SP25M

- SM25-x

- SH25-x

For information on the SP25M and FCR-25 systems, clicking these icons. You need an Internet connection to view the following:

- SP25M

- FCR-25

The SP25M system can adapt to any of five different SM25 modules for varied styli lengths and weights, and a sixth module for use with the TP20. They all use the same SP25M probe body.

- SM25-1 module - This module accepts only the SH25-1 stylus holder. It is used for styli lengths between 20 mm and 50 mm.

- SM25-2 module - This module accepts only the SH25-2 stylus holder. It is used for styli lengths between 50 mm and 105 mm.

- SM25-3 module - This module accepts only the SH25-3 stylus holder. It is used for styli lengths between 120 mm and 200 mm.

- SM25-4 module - This module accepts only the SH25-4 stylus holder. It is used for styli lengths between 220 mm and 400 mm.

- SM25-5 module - This module accepts only the SH25-5 stylus holder. It supports straight styli lengths of approximately the same range as the SM25-2. However, it is specially designed for improved handling of perpendicularly attached styli (that is, crank styli configurations). The maximum length of a crank stylus depends on how far down from the stylus holder it is attached. The maximum crank stylus length forms an approximately conical shape varying from 105 mm at 15 mm down to 20 mm at 80 mm down.

- TM25-20 module - This module can only accept TP20 touch trigger probes and therefore does not support scanning.

Any of the SM25-x modules above are capable of individual touch probing as well as scanning.

More:

Example of SP25 with Multiple Probes